Enhanced Domain Decomposition–Model Order Reduction Method for Efficient Broadband Full-Wave Analysis of Multilayer Printed Circuit Boards

The approximate modal interface–solution space projection is a combined domain decomposition–model order reduction method for an efficient broadband full-wave simulation of multilayer printed circuit boards. The method features a high efficiency and full-wave accuracy for modern electronic designs. In this paper, a number of enhancements to our previously reported algorithm are presented. The enhanced method lifts the restriction on the mesh consistency at subdomain interfaces, and incorporates a coaxialline model for via-holes as a connection for adjacent interface systems. These enhancements facilitate the mesh generation and improve the modeling flexibility of our numerical method.